Gold nanoparticle-decorated reduced graphene oxide as a highly effective catalyst for the selective α,β-dehydrogenation of N-alkyl-4-piperidones

• Brenda Flore Kenyim,
• Mihir Tzalis,
• Marilyn Kaul,
• Robert Oestreich,
• Aysenur Limon,
• Chancellin Pecheu Nkepdep and
• Christoph Janiak

Beilstein J. Nanotechnol. 2026, 17, 218–238, doi:10.3762/bjnano.17.15

• , recycling, and reuse of the catalyst, which also concerns the stability of the catalyst. This was tested for the most active rGO-based catalysts over four runs. The catalysts were separated by filtration using standard filter paper, then thoroughly washed and dried before being reused in subsequent reaction

• , which were not retained by the used MN 615 1/4 cellulose filter paper with 4.0–12.0 µm pore sizes [53]. These results unambiguously demonstrate that the reaction proceeds via a truly heterogeneous catalytic mechanism, with Au nanoparticles remaining immobilized on the rGO support throughout the reaction

Influence of surface characteristics on the in vitro stability and cell uptake of nanoliposomes for brain delivery

• Dushko Shalabalija,
• Ljubica Mihailova,
• Nikola Geskovski,
• Andreas Zimmer,
• Otmar Geiss,
• Sabrina Gioria,
• Diletta Scaccabarozzi and
• Marija Glavas Dodov

Beilstein J. Nanotechnol. 2026, 17, 139–158, doi:10.3762/bjnano.17.9

Reduced graphene oxide paper electrode for lithium-ion cells – towards optimized thermal reduction

• Agata Pawłowska,
• Magdalena Baran,
• Stefan Marynowicz,
• Aleksandra Izabela Banasiak,
• Adrian Racki,
• Adrian Chlanda,
• Tymoteusz Ciuk,
• Marta Wolczko and
• Andrzej Budziak

Beilstein J. Nanotechnol. 2026, 17, 24–37, doi:10.3762/bjnano.17.3

• 1 M LiPF6 solution in EC/DMC (Sigma-Aldrich/Merck) served as the electrolyte. A Whatman GF/A filter was used as a separator. The current rates were calculated based on the targeted current density and active mass material, in this case, the mass of the positive electrode (the investigated graphene

Quantitative estimation of nanoparticle/substrate adhesion by atomic force microscopy

• Aydan Çiçek,
• Markus Kratzer,
• Christian Teichert and
• Christian Mitterer

Beilstein J. Nanotechnol. 2026, 17, 1–14, doi:10.3762/bjnano.17.1

• MiniLab 125 vacuum system equipped with a Nikalyte NL-UHV NP source, described in detail in a previous study [28]. The NP source is mounted at 45° angle to the deposition chamber and consists of two components, namely, the magnetron head and the aggregation zone with an attached quadrupole mass filter

• NPs with desired masses. An AC voltage, V = ±250 V, with a frequency of 4.19 kHz, a DC voltage, U = +2.5 V, and a U/V ratio of 0.02 were used. In the filter mode, the QMF was set to a NP diameter of 7 nm. Then, the NPs pass through a mesh grid with +21.7 V grid bias voltage, enabling to determine the

Internal 3D temperature mapping in biological systems using ratiometric light-sheet imaging and lipid-coated upconversion nanothermometers

• Dannareli Barron-Ortiz,
• Enric Pérez-Parets,
• Rubén D. Cadena-Nava,
• Emilio J. Gualda,
• Jacob Licea-Rodríguez,
• Juan Hernández-Cordero,
• Pablo Loza-Álvarez and
• Israel Rocha-Mendoza

Beilstein J. Nanotechnol. 2025, 16, 2306–2316, doi:10.3762/bjnano.16.159

• , achieving a 1.3 × 1.3 mm2 FOV and ≈1.3 μm axial resolution. Two interferometric filters (Thorlabs, MF510-40, and MF559-34) isolated the 525 and 550 nm UC fluorescence bands, while a bandpass filter (Thorlabs, FESH-0650) blocked the excitation light. To heat the immersed sample, a custom-made immersion

• of the thermally coupled emission bands. Sequential filter exchange limits the frame rate when using a single detector, whereas dual-camera configurations require precise spatial registration to avoid pixel mismatches and artifacts in the FIR calculation. To mitigate these limitations, we are

• currently developing an alternative approach based on color CMOS detection, which retrieves the spectral intensity from a single RGB image and eliminates the need for mechanical filter switching. This strategy, though beyond the scope of the present work, is expected to enable true real-time 3D

Terahertz-range on-chip local oscillator based on Josephson junction arrays for superconducting quantum-limited receivers

• Fedor V. Khan,
• Lyudmila V. Filippenko,
• Andrey B. Ermakov,
• Mikhail Yu. Fominsky and
• Valery P. Koshelets

Beilstein J. Nanotechnol. 2025, 16, 2296–2305, doi:10.3762/bjnano.16.158

• parasitic capacitance in the band of operation. The connection of the JJ array to the DC bias supply is implemented using Chebyshev low-pass filters (LP filter in Figure 2) in order to prevent the array radiation from leaking into these lines. In order to suppress the standing waves in the array, the

Visualizing nanostructures in supramolecular hydrogels: a correlative study using confocal and cryogenic scanning electron microscopy

• Shaun M. Smith,
• Ferdinando Malagreca,
• Jacqueline Hicks,
• Giuseppe Mantovani,
• David B. Amabilino,
• Christopher Parmenter and
• Lluïsa Pérez-García

Beilstein J. Nanotechnol. 2025, 16, 2274–2284, doi:10.3762/bjnano.16.156

• has been pulled apart because of compression of the sample. (C) Homogeneous, unbroken area of ZnPc@Gel. (D) Area exhibiting partial gel disruption. Imaging parameters: laser 650 nm, emission LP filter 650 nm, laser power 100%. CLSM micrographs of DPP-BC@Gel, [DPP-BC] = 100 µM. (A) Micrograph of the

• ] = 100 μM. Gel prepared in 1:1 water–ethanol and [1·2Br] = 12 mM. The scale bar for both images is 20 µm. Accelerating voltage for cryo-SEM was 3.3 kV (InLens detector). CLSM imaging parameters: laser 650 nm, emission LP filter 650 nm, laser power 100%. CLSM (A) and cryo-SEM (B) micrographs of DPP-BC@Gel

Optical bio/chemical sensors for vitamin B₁₂ analysis in food and pharmaceuticals: state of the art, challenges, and future outlooks

• Seyed Mohammad Taghi Gharibzahedi and
• Zeynep Altintas

Beilstein J. Nanotechnol. 2025, 16, 2207–2244, doi:10.3762/bjnano.16.153

Microplastic pollution in Himalayan lakes: assessment, risks, and sustainable remediation strategies

• Sameeksha Rawat,
• S. M. Tauseef and
• Madhuben Sharma

Beilstein J. Nanotechnol. 2025, 16, 2144–2167, doi:10.3762/bjnano.16.148

Electron transport through nanoscale multilayer graphene and hexagonal boron nitride junctions

• Aleksandar Staykov and
• Takaya Fujisaki

Beilstein J. Nanotechnol. 2025, 16, 2132–2143, doi:10.3762/bjnano.16.147

• perpendicular to the layers in the stacking direction. We compared the decay of the current with the number of layers and evaluated the ability of h-BN to filter currents as a material coating. To investigate the effect of disorder, we included two major defects in the graphene lattice, namely, nitrogen doping

Quality by design optimization of microemulsions for topical delivery of Passiflora setacea seed oil

• Daniel T. Pereira,
• Douglas Dourado,
• Danielle T. Freire,
• Dayanne L. Porto,
• Cícero F. S. Aragão,
• Myla L. de Souza,
• Guilherme R. S. de Araujo,
• Ana Maria Costa,
• Wógenes N. Oliveira,
• Anne Sapin-Minet,
• Éverton N. Alencar and
• Eryvaldo Sócrates T. Egito

Beilstein J. Nanotechnol. 2025, 16, 2116–2131, doi:10.3762/bjnano.16.146

• 4:1 ratio of n-hexane to P. setacea seeds, following the methodology recommended by the Association of Official Analytical Chemists [55]. Prior to extraction, dried seeds were grounded, placed in folded filter paper, and inserted into the Soxhlet extractor. The extraction was carried out for 6 h at

Multifrequency AFM integrating PeakForce tapping and higher eigenmodes for heterogeneous surface characterization

• Yanping Wei,
• Jiafeng Shen,
• Yirong Yao,
• Xuke Li,
• Ming Li and
• Peiling Ke

Beilstein J. Nanotechnol. 2025, 16, 2077–2085, doi:10.3762/bjnano.16.142

• channels after the pre-amplifier for dedicated, parallel processing of PFT feedback path and high-eigenmode detection path. The channel of the PFT feedback path is processed by the system’s built-in PeakForce electronics. A low-pass filter (200 kHz cut-off) and synchronization algorithms suppress high

• -sample-related contribution, a 3×3 median filter was applied, and all subsequent quantitative analysis was performed on the processed data. Results and Discussion Vibration control strategy in PFT-based multifrequency AFM mode In standard PFT mode, acquiring high-frequency force curves (typically 0.5–2

Beyond the shell: exploring polymer–lipid interfaces in core–shell nanofibers to carry hyaluronic acid and β-caryophyllene

• Aline Tavares da Silva Barreto,
• Francisco Alexandrino-Júnior,
• Bráulio Soares Arcanjo,
• Paulo Henrique de Souza Picciani and
• Kattya Gyselle de Holanda e Silva

Beilstein J. Nanotechnol. 2025, 16, 2015–2033, doi:10.3762/bjnano.16.139

• scaffolds remains challenging, as modifications that improve release kinetics or protect the core can sometimes compromise biocompatibility or cellular interactions [55]. To evaluate the structure of the nanofibers produced, confocal microscopy was used under a fluorescent filter to study the morphologies

Quantum circuits with SINIS structures

• Mikhail Tarasov,
• Mikhail Fominskii,
• Aleksandra Gunbina,
• Artem Krasilnikov,
• Maria Mansfeld,
• Dmitrii Kukushkin,
• Andrei Maruhno,
• Valeria Ievleva,
• Mikhail Strelkov,
• Daniil Zhogov,
• Konstantin Arutyunov,
• Vyacheslav Vdovin,
• Vladislav Stolyarov and
• Valerian Edelman

Beilstein J. Nanotechnol. 2025, 16, 1931–1941, doi:10.3762/bjnano.16.134

• integrated in twin-slot and double-dipole antennas. The miniature size of SINIS detectors allows them to be integrated into antennas of various types. Also, the detector itself is not frequency-selective, but by integrating such devices into various antennas and using additional filter elements, the

• characteristics of the SINIS detector matrix installed inside the cryostat with a closed optical window and under irradiation by the source; The lower part demonstrates a PT2 temperature of 2.6 K and a 3He pot temperature of 263 mK. Transmission spectrum of the cold mesh filter. (a) I–V curves and dynamic

PEGylated lipids in lipid nanoparticle delivery dynamics and therapeutic innovation

• Peiyang Gao

Beilstein J. Nanotechnol. 2025, 16, 1914–1930, doi:10.3762/bjnano.16.133

• analyzed by high-field 1H NMR spectroscopy and diffusion-filter techniques. The ALC-0159 PEG lipid consists of a PEG2k chain conjugated to a C14–C14 dialkyl glycerol anchor. The surface PEG chain density was estimated at 27.3 PEG chains per 100 nm2 according to the average LNP diameter of 77 nm; this

Low-temperature AFM with a microwave cavity optomechanical transducer

• Ermes Scarano,
• Elisabet K. Arvidsson,
• August K. Roos,
• Erik Holmgren,
• Riccardo Borgani,
• Mats O. Tholén and
• David B. Haviland

Beilstein J. Nanotechnol. 2025, 16, 1873–1882, doi:10.3762/bjnano.16.130

• showing the rippling effect caused by pulse-tube vibrations. The orange curve is obtained by applying a low-pass filter with cutoff frequency 0.75 Hz. (e) Effect of filtering and smoothing on the acquired image. Device parameters Ωm and Γ are determined by fitting the measured mechanical resonance. ω0, κ

Self-assembly and adhesive properties of Pollicipes pollicipes barnacle cement protein cp19k: influence of pH and ionic strength

• Shrutika Sawant,
• Anne Marie Power and
• J. Gerard Wall

Beilstein J. Nanotechnol. 2025, 16, 1863–1872, doi:10.3762/bjnano.16.129

• . Formation of protein fibrils Purified rPpolcp19k-his protein was concentrated to 500 µg/mL using an Amicon® Ultra Centrifugal Filter, 10 kDa MWCO (Merck). The protein was reconstituted at 500 µg/mL in 10 mM sodium acetate buffer (pH 4.0) or 10 mM sodium phosphate buffer (pH 8.0) with NaCl concentrations

Current status of using adsorbent nanomaterials for removing microplastics from water supply systems: a mini review

• Nguyen Thi Nhan and
• Tran Le Luu

Beilstein J. Nanotechnol. 2025, 16, 1837–1850, doi:10.3762/bjnano.16.127

• range of 1–20 μm can easily pass through the filter layers, limiting the overall removal efficiency [41]. These observations highlight the persistence of MPs, especially those with small sizes, in treated water, revealing the limitations of current technologies and the need for ongoing innovation in

Phytol-loaded soybean oil nanoemulsion as a promising alternative against Leishmania amazonensis

• Victória Louise Pinto Freire,
• Mariana Farias Alves-Silva,
• Johny W. de Freitas Oliveira,
• Matheus de Freitas Fernandes-Pedrosa,
• Alianda Maira Cornélio,
• Marcelo de Souza-Silva,
• Thayse Silva Medeiros and
• Arnóbio Antônio da Silva Junior

Beilstein J. Nanotechnol. 2025, 16, 1826–1836, doi:10.3762/bjnano.16.126

• were filtered through a 0.45 µm Millipore filter, and drug solutions were filtered through a 0.22 µm Millipore filter. Then, cells were treated with blank nanoemulsions and PHYT in serial dilutions, considering the concentration of drugs in the formulations (200 to 3.125 µg/mL) and incubated for 24 and

Multifunctional anionic nanoemulsion with linseed oil and lecithin: a preliminary approach for dry eye disease

• Niédja Fittipaldi Vasconcelos,
• Almerinda Agrelli,
• Rayane Cristine Santos da Silva,
• Carina Lucena Mendes-Marques,
• Isabel Renata de Souza Arruda,
• Priscilla Stela Santana de Oliveira,
• Mércia Liane de Oliveira and
• Giovanna Machado

Beilstein J. Nanotechnol. 2025, 16, 1711–1733, doi:10.3762/bjnano.16.120

• conducted to determine (1) the appropriate amounts of surfactant in the pre-emulsions, (2) the nanoformulation prepared in an ophthalmic vehicle (OV), and (3) its stabilization with a co-surfactant. The formulations prepared in the OV were sterilized using a polyethersulfone (PES) membrane filter (0.22 μm

• liquid was removed with filter paper, and the samples were counterstained with 2.5% uranyl acetate (w/v). The grids were then dried under vacuum for 24 h before TEM analysis. Long-term stability test The long-term stability of the nanoformulations was assessed by storing the samples in hermetically

Beyond the bilayer: multilayered hygroscopic actuation in pine cone scales

• Kim Ulrich,
• Max David Mylo,
• Tom Masselter,
• Fabian Scheckenbach,
• Sophia Fischerbauer,
• Martin Nopens,
• Silja Flenner,
• Imke Greving,
• Linnea Hesse and
• Thomas Speck

Beilstein J. Nanotechnol. 2025, 16, 1695–1710, doi:10.3762/bjnano.16.119

• reconstructed using the GridRec algorithm [36] with a Shepp–Logan filter, implemented in TomoPy [37] with the P05 reconstruction pipeline. The resulting voxel size was 127 nm. Prior to the DVC analysis, some preprocessing was performed using FIJI (ver. 1.54f) [38]. Since the sample expanded in vertical

• five resolution levels using a Gaussian filter was applied. The number of iterations per resolution level was set to 1000 for the affine transformation and 2000 for the B-spline transformation. Advanced normalized correlation was chosen as the correlation metric. The detailed parameter files

• , “Affine_parameters.txt” and “BSpline_parameters.txt” can be found in Supporting Information File 1. Based on the resulting displacement field, the Green–Lagrangian strain was calculated using the Insight Toolkit strain filter extension (ITK: ver. 5.3.0, itk-strain: ver. 0.4.0) [40] in Python (ver. 3.11.9) [41]. Finally

Prospects of nanotechnology and natural products for cancer and immunotherapy

• Jan Filipe Andrade Santos,
• Marcela Bernardes Brasileiro,
• Pamela Danielle Cavalcante Barreto,
• Ligiane Aranha Rocha and
• José Adão Carvalho Nascimento Júnior

Beilstein J. Nanotechnol. 2025, 16, 1644–1667, doi:10.3762/bjnano.16.116

• Organization (WIPO) were used to carry out the search using the descriptors “nano* AND cancer AND natural product” for research associated with cancer treatment, while the descriptors “nano* AND immun* AND natural product” was implemented to analyze patents related to immunotherapy. Furthermore, a time filter

The role of biochar in combating microplastic pollution: a bibliometric analysis in environmental contexts

• Tuan Minh Truong Dang,
• Thao Thu Thi Huynh,
• Guo-Ping Chang-Chien and
• Ha Manh Bui

Beilstein J. Nanotechnol. 2025, 16, 1401–1416, doi:10.3762/bjnano.16.102

• that for nylon, particularly in pore volumes ranging from 1 to 11, due to differences in charge and surface interactions. Conventional MP treatment models using BC include batch tanks and filter columns, as presented in Table S3, Supporting Information File 1. Based on statistical results depicted in

• Figure 6c, the MP removal efficiency using filter column models is 95.31% ± 5.26%, while the batch-modified BC model achieved 93.36% ± 4.92%. Fixed columns are highly effective for MP sizes of approximately 10 µm and larger, whereas batch methods are preferred for MPs smaller than 10 µm. The efficiencies

• of these two models are based on different mechanisms, as described in Figure 6. MP removal by BC filter columns is primarily facilitated by the fixation of particles through filtration effects, entanglement due to surface roughness and hydrophobic interactions [47]. The negatively charged surfaces

Deep-learning recognition and tracking of individual nanotubes in low-contrast microscopy videos

• Vladimir Pimonov,
• Said Tahir and
• Vincent Jourdain

Beilstein J. Nanotechnol. 2025, 16, 1316–1324, doi:10.3762/bjnano.16.96

• 400–2000 nm) provided white light excitation across the visible spectrum. Two crossed polarizers were employed, with a polarizer and analyzer used to enhance the scattered field from the nanotubes relative to the stronger reflected field from the substrate. A low-pass optical filter with a cutoff

• wavelength of 700 nm was placed after the analyzer to filter out blackbody radiation generated by the heating crucible. A long-distance objective (Nikon Plan Fluor ELWD 20× 0.45 C L) was used for illumination and collection. Growth process videos were captured using a digital camera (Hamamatsu c11440 ORCA

• by frame through the video. To extract the growth kinetics of each nanotube, the as-recognized objects were tracked using the Hungarian method [25] and Kalman filter (or linear quadratic estimation) [26], which are widely used for object tracking [27]. The Hungarian algorithm matched masks across

Wavelength-dependent correlation of LIPSS periodicity and laser penetration depth in stainless steel

• Nitin Chaudhary,
• Chavan Akash Naik,
• Shilpa Mangalassery,
• Jai Prakash Gautam and
• Sri Ram Gopal Naraharisetty

Beilstein J. Nanotechnol. 2025, 16, 1302–1315, doi:10.3762/bjnano.16.95

• 2400 nm. The TOPAS Prime optical parametric amplifier supplied by Light Conversion is used for this purpose. Subsequently, the laser beam was directed to ablate stainless steel following wavelength adjustments. To regulate the laser beam’s final intensity at the sample, an ND variable filter (VF) was

• periodic surface structures (LIPSS). Critical components of this setup include the femtosecond laser, optical parametric amplifier (OPA), ND variable filter (VF), mirrors (M), three-axis stages (3D stages), and a convex lens (L) employed to focus the laser beam onto the surface precisely. The inset image